Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a first embodiment;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof;

FIG. 6 is the sixth image thereof;

FIG. 7 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a second embodiment;

FIG. 8 is the second image thereof;

FIG. 9 is the third image thereof;

FIG. 10 is the fourth image thereof;

FIG. 11 is the fifth image thereof;

FIG. 12 is the sixth image thereof;

FIG. 13 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a third embodiment;

FIG. 14 is the second image thereof;

FIG. 15 is the third image thereof;

FIG. 16 is the fourth image thereof;

FIG. 17 is the fifth image thereof;

FIG. 18 is the sixth image thereof;

FIG. 19 is a front view of the first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceshowing our new design according to a fourth embodiment;

FIG. 20 is the second image thereof;

FIG. 21 is the third image thereof;

FIG. 22 is the fourth image thereof;

FIG. 23 is the fifth image thereof; and,

FIG. 24 is the sixth image thereof.

The outer perimeter shown in broken lines in the drawings illustrates adisplay screen or portion thereof that forms no part of the claimeddesign. The remaining broken lines in the drawings illustrate portionsof the graphical user interface that form no part of the claimed design.

The appearance of the transitional image sequentially transitionsbetween the images shown in FIGS. 1-6, 7-12, 13-18, and 19-24,respectively. The process or period in which one image transitions toanother image forms no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.